startup

local p = peripheral.wrap("left")
function getInfo()
  info = p.getPlayers()
  return info
end

function getUsername()
  getInfo()
  info = p.getPlayers()
  if #info > 0 then
    username = info[1].name
  else
    username = " "
  end
  return username
end

rs.setOutput("back",true)
while true do
  getUsername()
  if username == "147panda" then
    rs.setOutput("back",false)
  else
    rs.setOutput("back",true)
  end
sleep(0.15)
end